我有models.py分钱:
class Item(models.Model):
image_file = models.ImageField(upload_to='images')
image_url = models.URLField()
我希望Django自动下载和本地保存图像从image_url和连接它与image_file
How it should act:个
https://docs.djangoproject.com/s/img/site/hdr_logo.gif
<img src="{{ item.image_file.url }}">.它显示出
来self 的服务器的图像，而不是djangoproject.com
What I've tried:
我已经改写了Item类的save个方法.我通过urllib在本地保存了图像，但我坚持将此保存的图像与image_file字段连接起来
from django.core.files import File
import os
class Item(models.Model):
image_file = models.ImageField(upload_to='images')
image_url = models.URLField()
...
def get_remote_image(self):
if self.image_url and not self.image_file:
result = urllib.urlretrieve(self.image_url)
self.image_file.save(
os.path.basename(self.image_url),
File(open(result[0]))
)
self.save()
您可以覆盖默认的save()方法以自动调用get_remote_image().
请参阅:https://docs.djangoproject.com/en/dev/topics/db/models/#overriding-model-methods